Question

You finish washing 3/4 of your windows in an hour and a half. At that rate, how much longer will it take you to finish washing all the windows?

If you are washing the windows at a rate of 1/4 every 30 minutes, you need only 30 minutes to finish washing the remaining one-fourth.

Answer 1

2 hours to finish whole thing

but 1/4 = 30 min

Answer 2

It would take about to hours to wash all the windows.